Wireless Communication System

1. A wireless communication system comprising: a plurality of mobile terminals; a plurality of transceivers having a specific area, respectively, each of the plurality of transceivers performing wireless communication with a mobile terminal which is in the specific area; a plurality of baseband signal processors which modulates data to be transmitted to one of the plurality of transceivers and demodulates data received from one of the plurality of transceivers; a switch which switches the connection of the plurality of transceivers and the plurality of baseband processors; and a controller which calculates an operation rate of the transceivers and the baseband processors, continues or stops a power supply for driving the transceivers and the baseband processors in accordance with a calculation result of the operation rate, and controls the switch to reconnect the transceivers coupled to one of the baseband processors of which the power supply has been stopped to another baseband processor of which the power supply is continued; wherein the controller continues or stops the power supply to the baseband processor on the basis of the operation rate of the baseband processor and switches a cell number which specifies the cell assigned to a wireless unit and to the baseband processor.

2. The wireless communication system according to claim 1 , wherein the controller controls the switch to: reproduce packet data received from the baseband processor of which the power supply is continued and transmits the same packet data to the plurality of transceivers coupled to the baseband processor of which the power supply is continued; and add up the packet data received from the plurality of transceivers and output the added packet data to the baseband processor to which the power supply is continued.

3. The wireless communication system according to claim 1 , wherein: the wireless unit and the baseband processor store information about an operation control signal representing continuation or stop of the power supply, and a cell number notification signal representing the cell number after switching the cell number; the switch stores information about a connection control signal representing the relation of connection after switching the cell number; the wireless unit and the baseband processor continue or stop the power supply in accordance with the information about the stored operation control signal in accordance with a cell number change notification signal representing a change in the cell number transmitted from the controller, and switch the cell number in accordance with the information about the stored cell number notification signal; and the switch switches the relation of connection in accordance with the information about the stored connection control signal in accordance with the cell number change notification signal.

4. The wireless communication system according to claim 1 , wherein the controller controls to stop the power supply to the wireless unit when no mobile terminal exists in the specific area of the wireless unit.

5. The wireless communication system according to claim 1 , wherein the switch includes a counter which counts time until the relation of connection is switched, and sets a count value of the counter in accordance with a difference value of a frame number of received data and a frame number indicating switching timing of the relation of connection transmitted from the controller.

6. The wireless communication system according to claim 1 , wherein each of the plurality of baseband processors includes a GPS receiver which provides synchronization among the plurality of baseband processors in accordance with received GPS signal and outputs synchronization signal for synchronizing the transceivers and the mobile terminals with the baseband processors.